sunflow error

[ppanula]

Under CentOS Sunflow says this Exception.

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Sunflow Rendering System (Run 1 of 2)
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Exception in thread "main" java.lang.NoSuchMethodError: method java.lang.String.format with signature (Ljava.lang.String;[Ljava.lang.ObjectLjava.lang.String; was not found.
at org.sunflow.system.UI.printError(Unknown Source)
at org.sunflow.SunflowAPI.runSystemCheck(Unknown Source)
at SunflowGUI.main(Unknown Source)
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java version "1.4.2"
gij (GNU libgcj) version 4.1.2 20070626 (Red Hat 4.1.2-14)